Most online networkers tend to stay 5 years in one phase of their online evolution. Up to now, most people where in the 2 first phases (left) of this model.
The Portals mentioned in phases 1 and 2 now seem to have reached a peak in their popularity (they might still grow in numbers of profiles but their 'unique daily visitors' decline or stagnate) and more and more people are seeing that these networks do not offer a lot of Value.
For a moment it was funny to send out virtual 'flowers' or 'hugs' on social media but also there we can see that people are getting bored with all these 'dating' applications which are also very time-consuming.